Layman, R. (1981). Shadow man: The life of Dashiell Hammett / by Richard Layman. Harcourt Brace Jovanovich.
Lua i Stíl Chicago (17ú heag.)Layman, Richard. Shadow Man: The Life of Dashiell Hammett / by Richard Layman. New York [u.a.]: Harcourt Brace Jovanovich, 1981.
Lua MLA (8ú heag.)Layman, Richard. Shadow Man: The Life of Dashiell Hammett / by Richard Layman. Harcourt Brace Jovanovich, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.